(19)

(11)

EP 0 428 509 A1

(12)

(43) Date of publication: 29.05.1991 Bulletin 1991/22 (21) Application number: 88907971.0 (22) Date of filing: 15.08.1988

(51) International Patent Classification (IPC):  B08B 9/ 04( . ) E03F 9/ 00( . ) (86) International application number: PCT/US1988/002792 (87) International publication number: WO 1990/001380 (22.02.1990 Gazette 1990/05)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (71) Applicant: LEWISAN PRODUCTS, INC. Racine, WI 53403 (US)	(72) Inventor: KAYE, Paul, S. Racine, WI 53402 (US) (74) Representative: Vogel, Georg  Pat.-Ing. Georg Vogel Hermann-Essig-Strasse 35 D-71701 Schwieberdingen D-71701 Schwieberdingen (DE)